Another plus-up for the Dometic DTU (turbo) units. I found the OEM 7KBtu Dometic ac unit inadequate in this red boat in 90-degree water on a 98-degree day until about 10 PM, when running at 100% duty cycle, it finally cooled the smallish downeast cabin to 78F. I swore that I would someday replace it with a higher capacity unit. That opportunity came 13 months ago when long term corrosion due to a previously clogged pan drain system ended the life of the OEM unit. I planned to replace it with a standard Dometic 10 KBtu unit, but found it would not physically fit in the small area designated for it. However, the Dometic Turbo 10KBtu unit fit well. Cost was hugely more, though.
The first thing I noticed when I unpacked the DTU was the abundance of shiny copper and the plastic drip pan. The Turbo performed well on what for an air conditioner was a challenging 6-day trip in the Florida heat. It is very quiet, and now that I have a Micro-Air soft starting microprocessor installed, its fairly quiet compressor startup sound as well as the generator loading sounds are simply not heard. I note that this unit is right under the bunk.
The dealer told me that there are a number of firmware subroutines running in the DTU and that it should not be shut down using a breaker (nor should ANY electrical equipment aboard). In support of that, I note that it takes a number of seconds before the CAL pump shuts down after I press the off button on the ac's control panel; so I don't jump to the breaker panel too quickly after shutting the ac down.
I also upgraded the seawater pump from a March to a CAL 900. Don't remember the capacity of the March, but the CAL is somewhat more.
AFAIK, 16 KBtu is as big as you can go in 110 VAC units. Before upgrading the ac unit in a boat, be sure the existing hose sizes in the boat match the new unit and that the water flow capacity is correct and that the breaker is also sized properly.
Glad you got your unit working well with Barnacle Buster. I just solved my generator's overheating issue with a BB flush. Now maybe I will give the ac a wash with it too. Luckily my hardtop ac is air-to-air!